Which of the following management products ARE updated as part of Managing a stage boundary?

Which of the following management products ARE updated as part of Managing a stage
boundary?
1. Business Case
2. Benefits Review Plan
3. Configuration Item Records
4. Project Brief

A.
1, 2, 3

B.
1, 3, 4

C.
1, 2, 4

D.
2, 3, 4